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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2020
Goodwill and Other Intangible Assets |
Summary of gross carrying amounts and accumulated amortization of other intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​ | September 30, | ​
(Dollars in thousands) |  | 2020 |  | 2019 |  | 2019 |
Gross carrying amount | ​ | $ | 258,162 | ​ | $ | 119,501 | ​ | $ | 119,501 | ​
Accumulated amortization | ​ |  | (86,525) | ​ |  | (69,685) | ​ |  | (66,418) | ​
​ | ​ | $ | 171,637 | ​ | $ | 49,816 | ​ | $ | 53,083 | ​
Schedule of estimated amortization expense for other intangibles for each of the next five quarters | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ | ​ | ​ | ​
Quarter ending: |  | ​ |  |
December 31,2020 | ​ | $ | 9,437 | ​
March 31,2021 | ​ |  | 8,831 | ​
June 30,2021 | ​ |  | 8,613 | ​
September 30,2021 | ​ |  | 8,201 | ​
December 31,2021 | ​ | ​ | 8,200 | ​
Thereafter | ​ |  | 128,355 | ​
​ | ​ | $ | 171,637 | ​

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding quarters for the finite-lived intangible assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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